The My Next Guest Needs No Introduction host will interview Kamala Harris' husband Doug Emhoff in a "virtual conversation" on Oct. 22, the night of the final presidential debate. Tickets start at $500 per person, and rise to $25,000. On Monday, Letterman's Late Show successor Stephen Colbert will co-host a Joe Biden fundraiser with Kamala Harris. "I’m very excited to be part of it! Please come!" tweeted Colbert.